Table 1

Observed (Obs) and expected (Exp) number of cause specific deaths and standardised mortality ratio (SMR) among 2562 male Norwegian SiC smelter workers in the follow up period 1962–96

Cause of death	ICD-9 codes	Obs	Exp	SMR	95% CI
All causes	1–999	847	753.6	1.1	1.1 to 1.2
Cancer	140–209	204	173.0	1.2	1.0 to 1.4
Circulatory diseases	390–459	376	371.7	1.0	0.9 to 1.1
Ischaemic heart disease	410–414	208	234.9	0.9	0.8 to 1.0
Cerebrovascular disease	431–438	91	71.6	1.3	1.0 to 1.6
Sudden death	798	37	24.3	1.5	1.1 to 2.1
Respiratory diseases	460–519	77	56.6	1.4	1.1 to 1.7
Asthma, chronic bronchitis, emphysema	490–493, 496	45	20.4	2.2	1.6 to 3.0
Pneumoconiosis	501–503, 505	6	0.8	7.9	2.9 to 17.1
Pneumonia	480–483, 485–486, 507	24	30.7	0.8	0.5 to 1.2
Digestive diseases	520–577	17	18.0	0.9	0.5 to 1.4
External causes	E800–999	58	49.1	1.2	0.9 to 1.5